/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.iotdb.db.mpp.plan.execution.config.metadata.template;

import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.SettableFuture;
import org.apache.iotdb.db.metadata.template.Template;
import org.apache.iotdb.db.mpp.common.header.ColumnHeader;
import org.apache.iotdb.db.mpp.common.header.ColumnHeaderConstant;
import org.apache.iotdb.db.mpp.common.header.DatasetHeader;
import org.apache.iotdb.db.mpp.common.header.DatasetHeaderFactory;
import org.apache.iotdb.db.mpp.plan.execution.config.ConfigTaskResult;
import org.apache.iotdb.db.mpp.plan.execution.config.IConfigTask;
import org.apache.iotdb.db.mpp.plan.execution.config.executor.IConfigTaskExecutor;
import org.apache.iotdb.db.mpp.plan.statement.metadata.template.ShowNodesInSchemaTemplateStatement;
import org.apache.iotdb.rpc.TSStatusCode;
import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType;
import org.apache.iotdb.tsfile.read.common.block.TsBlockBuilder;
import org.apache.iotdb.tsfile.utils.Binary;
import org.apache.iotdb.tsfile.write.schema.IMeasurementSchema;

import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

public class ShowNodesInSchemaTemplateTask implements IConfigTask {

    private final ShowNodesInSchemaTemplateStatement showNodesInSchemaTemplateStatement;

    public ShowNodesInSchemaTemplateTask(
            ShowNodesInSchemaTemplateStatement showNodesInSchemaTemplateStatement) {
        this.showNodesInSchemaTemplateStatement = showNodesInSchemaTemplateStatement;
    }

    @Override
    public ListenableFuture<ConfigTaskResult> execute(IConfigTaskExecutor configTaskExecutor)
            throws InterruptedException {
        return configTaskExecutor.showNodesInSchemaTemplate(this.showNodesInSchemaTemplateStatement);
    }

    public static void buildTSBlock(Template template, SettableFuture<ConfigTaskResult> future) {
        List<TSDataType> outputDataTypes =
                ColumnHeaderConstant.showNodesInSchemaTemplateHeaders.stream()
                        .map(ColumnHeader::getColumnType)
                        .collect(Collectors.toList());
        TsBlockBuilder builder = new TsBlockBuilder(outputDataTypes);
        try {
            if (template != null) {
                // template.get
                for (Map.Entry<String, IMeasurementSchema> entry : template.getSchemaMap().entrySet()) {
                    String keyName = entry.getKey();
                    IMeasurementSchema measurementSchema = entry.getValue();
                    builder.getTimeColumnBuilder().writeLong(0L);
                    builder.getColumnBuilder(0).writeBinary(new Binary(keyName));
                    builder.getColumnBuilder(1).writeBinary(new Binary(measurementSchema.getType().name()));
                    builder
                            .getColumnBuilder(2)
                            .writeBinary(new Binary(measurementSchema.getEncodingType().name()));
                    builder
                            .getColumnBuilder(3)
                            .writeBinary(new Binary(measurementSchema.getCompressor().name()));
                    builder.declarePosition();
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        DatasetHeader datasetHeader = DatasetHeaderFactory.getShowNodesInSchemaTemplateHeader();
        future.set(new ConfigTaskResult(TSStatusCode.SUCCESS_STATUS, builder.build(), datasetHeader));
    }
}
